The drying of the ink must be well controlled.
Release time:2025-05-19
Printing faults caused by improper ink drying mainly include:
(1) At a certain printing speed, if the ink dries too quickly, it will cause problems such as blurring, scratches, ink whitening, poor gloss, and poor leveling.
(2) In continuous color printing, if the ink dries too slowly, it will cause roller sticking in the next process and also cause the printed matter to stick when rewinding. The volatilization rate of the solvent in the ink depends not only on the boiling point, vapor pressure, and latent heat of vaporization of the solvent, but also on the temperature, relative humidity, air volume, and ink layer thickness of the printing environment. Therefore, the volatilization rate of the solvent in the ink should be adjusted in time according to the changes in conditions.
Under normal production conditions, if the ink dries too quickly, an appropriate amount of slow-drying thinner should be added; if the ink dries too slowly, a fast-drying thinner should be added. If conditions permit, the temperature of the printing environment should be controlled between 18 and 25℃, and the relative humidity should be controlled below 65%, which is conducive to the stability of the ink performance
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